Fixes site settings JS page.

[mkarolin]

Fixes brave/brave-browser#13271

Adjusted a patch to hide only the toggle on the page, but not the exceptions.

Submitter Checklist:

• There is a ticket for my issue.
• Used Github auto-closing keywords in the commit message.
• Wrote a good PR/commit description
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed).
• Requested a security/privacy review as needed.

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on.
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

[petemill]

Just moving the </if> higher up so looks good to me!

[kjozwiak]

Verification PASSED on Win 10 x64 using the following build:

Brave | 1.20.77 Chromium: 88.0.4324.79 (Official Build) nightly (64-bit)
-- | --
Revision | bd1e9353659b2491dac971226a973ca3b5684a14-refs/branch-heads/4324@{#1520}
OS | Windows 10 OS Version 2009 (Build 19042.746)

• ensured that Block & Allow are appearing under brave://settings/content/javascript
• ensured that enabling Scripts blocking via shields correctly adds the website into Blocked
• ensured that you can remove a website from Blocked which should also disable Scripts blocking for that site
  • ensured that the website loads after being removed from Blocked
  • ensured that the website loads when added into Allow